Article forming apparatus



Dec. 14, 1948. 5. s u 2,456,222

ARTICLE FORMING APPARATUS 3 Sheets-Sheet '1 Filed Nov. 30, 1944.

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Dec. 14, 1948.- Y 5',.s1- 2,456,222

V ARTICLE FORMING APPARATUS Filed Nov. 50, 1944 3 Sheets-Sheet 2 Arm/1w Dec. 14, 1948. 5, STULL 2,456,222

mucus FORMING APPARATUS s Sheets-Sheet s Filed Nov. 50, 1944 .m llll BYYJA/V7AM Patented Dec. 14, 1948 ARTICLE FORMING APPARATUS. John S; Stull',z..Chicago, Ill.,..assignortotwiestema Electric Company, Incorporated; New: York; NaYJ, moor-notation of New\Yo1:k

Application=Nevember-30, 1944, SerialNo: 5652915 (01. Mil -L031)- invention relates to articleforming. apparatus; andra. particularly; to: arr apparatus.- for fiorminge; terminah end rofisa coil;

The xinventioniis particularly: applicable to the formingzz'oft a terminali end; offer: vacuum tube: heaterrcoil Such azcoilimay; for-instance com prise; it comes: from: a;. coiling apparatus; coilii oi: .005 diameter i: tungsten alloyrwire. the. coi-Llhavimg an"outsideclframeterv of T e and-a length of eaclrvterminalk endr. extending. taangentially 4 fromzthevcoil atright angles to its-:1ongitudinal-. axis.- In order c130 facilitate: the. mounting; andi rv connecting; 0-151 theif terminal. ends. ofrther. coils. intonthe vacuum.-tube structure and. circuit; the .tangentzen'ds of. each: coilushollljdi be pneferabLy" preformed: to required) formations. relativeto the longitudinal a-xislof; the: 0011 Due.- to-zthe microscopic. dimensions of the coils; reats difiiculty is encountered in handling, forming and giving=.- the. terminal lends: .a desired. Eset and also providings a z desired uniform.- formation to the: ends ofith'e; coi'lse An: object of this-invention: is toprovide a. simple; eificient and? practicable: apparatus for uniformlytforming :ancdi setting terminal ends of. coilsioiitheatypeabovedescribed;.

Inn order. to attain this obj ect; in z accordance with' one: embodinient: of itheainvention: as applied to the forming-:ofone. terminatien'd of..the coili' hereinbefore described; wheizeinathe' end is to extend patallelztoi the longitudinal axis-sci. the coil'.

and in:'alignmentiwithithe-outer periphery there-' 015; there; is." providedhan: apparatus comprising: a stationary arbor. f or supporting. the coil, stationand: movable-. elements atttopposite: sides of r thearbonsmformed as to provide a pocket about" theearborior receivin'guthercoil and a faceon the stationary: element: for: initially positioning: and then guidingcthe terminalgends during: the formingathereof: Theamovabiea element is formed W-ith aribending: point; about: which: the terminal end; is:-.'bent;: and aminclined forming; face; against! which: theiterminal. end is pressed andibentitoiset. it. A springaactuated:iplungerrnormalbc urges the:

movable. element. towand the ;arbor1.-to;.c1amp a from:.= or :mountedf onizthecarbor;

is-provideiwithcicarmfaces which successively errgegeuthezterminad; endr and tbend aiti'about' the bendingt-point'xandi pnessc-itagainst: the inclined fa cez'ofitheimovable. el'emenintoiform'andzsetzits Inc.

-: the; abutment: resuitsc-ii'm: the; lever; fulezfumi-ngi about ithe'zabutmentito iurtlzier bendaithe? terminal? end; van'ok.con'iphet'e the. formimgizan'd "settinggof the terminal Otheri'objfec-tssandsadvantagesrofiitheaimzerrtioni Willi be apparent from .the. followingzzdetatledrdeeseri 'ption talc-ens conjunction withsthea aceome' panying diraxwingss inimhicii't l'sandriz'iane'zfrazgmentarya'plan views-51cm ancenlanged: seale ofiiaimfarticie fbrmingcapparate 1 tusv embodying theLiieaturessofi-the inventionrand;

illustrating. different: operative positions theneot;

Fig.0. s aefront eleuatiomozfcFig. 231:

Fig: 4 is? greatly;eniargedzcfragmentary"ventie cakcross: sectionrztakeneon etheelme: 4'.-4 oiizFiguZ- Figs; .1 is: a; greatlyiemiargedi fragmentary' view oft: a: coil; azifronmettiztenminsalii endixaiiterz ree? movat .from Ltheeapparatus;

Fig: .6 rise greatlyfragmentaryrplan; viewshow ingrthercoil :clampedbincposit'ron andrits; terminal.

end' about to :hedormed; 1

Fig'n a; fragmentary-view similaritogFiga .6 showing the: terminal endii. of: the: coil partially",

formed 77.

Fig. 48' is;-a.;ver.tical: cmssusectirntalc'emaorr the:

EigmBkisvan:enlavged i fragmentary perspective: view'of'i a clamping rand-l forming: element? of: the.v

apparatus;

Rererring'now to. the: drawings: andi particularly toaFigs; 1, Zuand .3; .the=-numer.a1 lrflziindi'cates an: irregularly shaped::support-ingqblockz xis.a;ti-:--

tacl'i-ed at: .onewend; tona vertical: standard H;

which; inzturn may be rxxo1mted'fat' it's lowenemzlt;

Eormed in the upper faceiofith'e block 'l-fiszcavescommunicating right angulafly arramgedcslots.FZiancbi 3; inzawhichi are:miountedjrregularlyishaped z members td' 'an'd'l i155;== respectively-s. The; member l4 iszfixed in: the: slot 1. Miami the: member i151: iscslidablyi fittedinn thesslot .orzgiui'dewa-y' "i 3x Similarlyinclinediverti cat-adj acentvtacest I8:-.a, nd: i 9 in difierent *planes,

are provided. on the :members .l-i i and t5 and such faces: are arcuatelyugrooizedi asvindicated." at 20 and 241., respectively, to form apocket through which freel-yaextends san arbor: 22 L secured at its; inner; end Eto thevfixedim emloer W, the outeriree end ofi thexarborprojecting a' suitable distance from .the :forwardWarticali face of the block? Hi;

Theiar'cuate grooves Z'O andtit'are-fonmed paralieI oneiwnsitiom 01E. thera-leyer; ,itxoperatiizely :engages: s51; to thei longitudinal-axis ofi t'hee arbor Z2 and tfie groove 2| is of smaller diameter at its inner end to provide a seat 23 for a coil 24, a terminal end 25 of which is to be formed. At the juncture of the inclined face if! and the plane of the seat 23 on the member 15, and in line with the longitudinal axis of the coil 24, is a vertical bending edge 26, for the terminal end 25 to be referred to hereinafter. These latter details of the member l5 may be best seen by referring to Fig. 9.

In the operation of the apparatus, the slidable member l5, in one position, serves to clamp the coil 24 to the arbor 22, as shown clearly in Figs. 6 and 8. As shown, the arcuate formation 2| of the member I5 is so dimensioned and arranged that its inner face engages approximately three convolutions of the coil 24 at one side thereof and clamps them at their inner peripheries against the fixed arbor 22, the opposite sides of the coil convolutions being spaced from the arcuate face 20 of the fixed member M. In mounting the coil 24 on the arbor 22, the tangent terminal coil end 25 to be formed is arranged to lie against an upper face 21 of the member 14, thus initially positioning the coil end. An upper face 28 on the block ID at its left side lies in the plane of the face 21 of the member [4 and the right side of the upper face of the block lies in a higher plane than the faces 21 and 28. Fixed to the right upper face of the block H3 is a plate 29, which is notched at 32 for observation purposes, and it extends at its left end in spaced relation over the faces 27 and 2B. Formed in the block I is a guideway 33, in which is slidably mounted a bearing block 34, to which is pivotally attached, by means of a vertically disposed pin 35, an irregularly shaped hand lever 36, which bears closely on the faces 21 and 28 at its lower face and upon the bottom face of the plate 29 at its upper face. The plate 29 is formed with an aperture 39, through which the pin 35 freely extends, the diameter of the aperture being such that at one point in the operation of the apparatus, to be described hereinafter, the block 34, pin 35 and lever 36 may be bodily shifted to the position shown in Fig. 2. A compression spring 40 carried in an aperture 4i formed in the block and communicating with the slot l2 and guideway 33 and abutting at opposite ends the stationary member l4 and the bearing block 34, serves to normally maintain the block in the position shown in Fig. 1, wherein the pin 35 is bearing against the left side of the aperture 39 of the fixed plate 29. Mounted in an aperture 42, in the block I0, is a cup-shaped plunger 43, the aperture being interrupted by the guideway IS, in which is carried the movable member I and the latter member is notched at 46 to receive the plunger 43. An inclined side face 41 of the notch 46 provides a cam face, which cooperates with a similarly inclined face 48 on the plunger 43 to urge the movable member IE to the left, as shown in Fig. 2, by the normal action of a compression spring 49 carried -in the plunger 43 and bearing at opposite ends against the plunger and a stop plate 50 fixed to the block l0. In this referred-to positionl'of the movable member I5, as hereinbefore described. the inner face of the arcuate formation 21 there- I of engages the coil 24 and clamps it to the arbor against the stop pin 53 when the normal action of the plunger spring 49 is overcome. In this last-referred-to position of the movable member I5, it is withdrawn from the arbor 22 and is in position to permit a coil 24 to be removed from or mounted on the arbor.

At its upper end, as viewed in Fig. 2, or its right end, as viewed in Fig. 1, the hand lever 36 carries a depending roller 55 arranged to engage and actuate the spring-pressed plunger 43 when the lever is rocked clockwise about its pivot 35 to the position shown in Fig. 1, thereby overcoming the normal action of the spring 49 and permitting the leaf spring 54 to act in the manner and for the purpose previously referred to. In another position of the lever 36 (Fig. 2), a recessed face 56 thereof engages a fixed pin 51 on the face 28 of the block Ill. Formed on the right side of the lever 36 (Fig. 2) and, as shown on an enlarged scale in Figs. 6 and 7, are two edge or cam faces 60 and 6| which, when the lever is rocked counter-clockwise from the position shown in Fig. 1 to a position where its recessed face 56 is brought into contact with the fixed pin 51, successively engage the terminal end 25 of the coil 24 lying on the faces 2'! and 28 and bend the terminal end to the position shown in Fig. '7 about the bending edge 26 of the movable member l5. Fig. 6 shows the position of the lever 36 just before the cam face 60 thereon engages the terminal end 25 and before the recessed face 56 contacts the fixed pin 51. In this position of the lever 36 (Fig. 7), the terminal end 25 is partially bent and a continued urging of the lever counterclockwise against the fixed pin 5'! causes the lever to fulcrum about the latter pin and thus move with the bearing block 34, to which it is pivoted by the pin 35, to the right (Fig. 2) to the position shown.

This last described movement of the lever 36 bends the terminal end 25 further about the bending edge 26 to the dotted outline position of the terminal end shown in Fig. '7, or in full lines in Fig. 2, the terminal end being carried forward by the advancing cam face 6|, which is moving substantially parallel to the terminal end is pressed against the inclined face IQ of the movable member l5, which is held stationary at this time by the cooperating cam faces 41 and 48 on the member l5 and the plunger 43. A clearance notch is formed in the lever 36 at the lower end of the cam face 6|, which provides a face 62, which clears the end convolution of the coil 24 from which the terminal end extends and lies in the plane of the lower edge of the bending edge 26, thus effecting a sharp bending of the terminal end 25. The purpose of bending the terminal end 25 to the particular angle shown relative to the longitudinal axis of the coil 24 is to over-bend it so that, upon removing the coil from the apparatus, the'bent terminal end will spring back and take a set position in line with the longitudinal axis of the coil and in the plane of its outer periphery, as shown in Fig. 5.

In describing the use of the apparatus above described, it will be assumed, referring to Fig. 2, that the lever 36 is in an intermediate position between the fixed pin 51 and the plunger 43 and, further, that the coil 24 with the formed terminal end 25 has been removed from the apparatus. To mount a coil 24 in position on the arbor 22 and clamp the inner end convolutions thereof to the arbor in the manner previously referred to, the operator, with one hand, rocks the lever 36 OQ WiS about its pivot 35 to engage the roller zpssasaw 5 55 thereonvzwitlr-thesplungen'flrand-:depresses it, whereupon the plunger cam face 48 is retracted fromtliecam face 41 on the'movable member??- after,,th.e lever 36 is rockedcounter-clockwisev about"-its'..pivot 35 (Fig, ,I tl 1us..p ermitting,-,the spring 49'of the plunger 43 to normally act to move the plunger upwardly (Fig. 2) and thereby through the cooperating cam faces 48 and 41 on the plunger and movable member l5, respectively, causing the latter member to advance and clamp the coil convolutions in the manner previously described to the arbor 22.

In this counter-clockwise rotation of the lever 36, the cam faces 60 and GI successively engage the terminal end 25 and bend it to the position shown in Fig. '7 about the bending edge 26 of the member l5. Thereafter, in a continued counterclockwise movement of the lever 36, it engages the pin 51, thereby causing the lever to fulcrum about the pin and, in the manner previously described, causing the terminal end 25 to be bent sharply about the bending edge 26 to the position shown in Fig. 2. To remove the coil 24 from the apparatus, the lever 36 is rocked clockwise (Fig. 2) to depress the plunger 43 and, in the manner described hereinbefore, the coil is unclamped from the arbor 22 and another coil clamped thereto.

What is claimed is:

1. An article bending apparatus comprising means for supporting a portion of an article to be bent, a bending member engageable with a free portion of the article to be bent, a pivotal and slidable support for said member effective to guide its movement during the initial bending, and means for bodily moving said pivotal and slidable support and member along a rectilinear path to cause said member to complete the final bending action.

2. An article bending apparatus comprising means for supporting a portion of an article to be bent, a bending member engageable with a free portion of the article to be bent, a pivotal and slidable support for said member, yieldable means for retaining said slidable support in one position during the initial bending, and an abutment in the path of said member for causing said slidable support to move to a second position, said member pivoting about said abutment during said latter movement of said support to impart the final bend to said free article portion.

3. An article bending apparatus comprising means for supporting a portion of an article to be bent, a bending member engageable with a free portion of the article to be bent, a support having a face for positioning the free portion of the article to be bent and upon which said portion rests in the path of said member which rides on said face, a pivotal and slidable support forsald member effective to guide its movement during the initial bending, and means for bodily moving said pivotal and slidable support and member along a rectilinear path to cause said member to complete the final bending motion.

4. An article bending apparatus comprising means for supportin a portion of an article to be bent, a bending member engageable with a 4 port forsaid membereffective to:guide:its:mnv 1- free -portion of' the articlestmbe bent, .aisupportfr having a f ace f or positioning: the free portiomoff': tlie articleto be bent and uponvwhich saidi'iporr ti'on rests ih 'tl re path ot'said memberrwhie'htridesp on'said race; means-about whichi'the freetportiom oftlie arti'cleii's bent, a- -pivotal.andl slidableusu w merit during: the. initial. bending, ,and,1means:i'*on: moving-- said pi vot'al i and slidable support: and; membenalorrg a:- rectilinear path perpendicular". to it's pivotalaxis te cause said member to efiect the final bending action.

5. An apparatus=-for=bending an uncoiled end oi -a coil comprisinggplamping,meanslfor clamping a coil adjacent the end to be-pben-t; anbendingg:

member, a pivotal and slidable support for said member, an operating lever, means responsive to the initial movement of said lever to actuate said clamping means, the further movement of said lever causing said bending member to move in an arcuate path to partially bend said end, and means in the path of said member for causing said slidable support to move said member to further bend said end.

6.. An apparatus for bending an uncoiled end of a coil comprising clamping means for clamping a coil adjacent the end to be bent, a bending member, an operating lever, means responsive to the initial movement of said lever to actuate said clamping means, the further movement of said lever causing said bending member to move in an arcuate path to bend said end, and means effective during the final movement of said lever to change to path of movement of said bending member to impart the final bend to said end.

7. An article bending apparatus comprising cooperating members for holding an article to be bent, means normally acting upon one of said members to cause an article to be held by said members, means operatively connected to said one member effective when said first means is inactive thereon to cause a release of the article by said members, means about which the article is bent, and a lever engageable during movement thereof in one direction with said first means to render it inactive and in a movement in an opposite direction, causing it to act normally, said lever having a portion engageable with the article during said latter movement for bending it about said bending means.

8. An article bending apparatus comprising cooperating stationary and movable members for holding an article to be bent, means for normally urging said movable member in one direction to cause an article to be held by said members,

means for urgin said member in an opposite direction when said first means is inactive thereon to cause a release of the article by said members, a bending edge on said movable member, and a lever engageable during movement thereof in one direction with said first means to render it inactive and in a movement in an opposite direction, causing it to act normally, said lever having a cam face engageable with the article during said latter movement for bending it about said bending edge.

9. An apparatus for bending tangent ends of coils comprising cooperating stationary and movable members for holding a coil, means for normally urging said movable member in one direction, means for urging said member in an opposite direction when said first means is rendered inactive, said movable member having an arcuate face for clamping coil convolutions to said stationarymember, means about which the tangent 7 end-ofv the coil is bent, and a lever operatively associated with said movable member during a movement thereof in one direction to retract said first means to cause said movable member to be retracted from said stationary member by said second means and in a movement in an opposite direction, causing it to act normally, said lever having a portion engageable with the tangent end of the coil during said latter movement for bending it about said bending means.

JOHN S. STULL.

REFERENCES CITED The following references are of record in the file of this patent:

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